public class Circular {
	Circle bottom;
	double height;
	void setBottom(Circle c) {
		bottom = c;
	}
	void setHeight(double h) {
		height = h;
	}
	double getVolme() {
		if(bottom == null)
			return -1;
		else
			return bottom.getArea()*height/3.0;
	}
	double getBottomRadius() {
		return bottom.getRadius();
	}
	public void setBottomRadius(double r) {
		bottom.setRadius(r);
	}
}
